This was the moment when the massive Möhne dam was finally breached on the night of 16th-17th May 1943 during the top secret Operation Chastise. The specially-converted Lancaster B MkIII of Fl/Lt David Maltby ED906(G) AJ-J roars between the towers of the dam, having released the Upkeep bouncing bomb that would ultimately cause a cascade of water to flood into the valley below. Fl/Lt Harold Martin's identical aircraft, ED909(G) AJ-P can be seen off Maltby's port wing with all of its light ablaze, drawing enemy fire from the attacking bomber.